Question

Помогите с тригонометрией :с

Answer 1

$tg frac{2}{3x} =-1\\frac{2}{3x}=-frac{pi}{4}+pi n,; n in Z\\3x=frac{2}{-frac{pi}{4}+pi n}\\x=frac{2}{-frac{3pi }{4}+3pi n}\\x= frac{8}{-3pi +12pi n} = frac{8}{3pi (4n-1)} ; ,; nin Z$